Bjarni Jónsson
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Bjarni Jónsson is a mathematician and logician working in universal algebra and lattice theory. He is emeritus Distinguished Professor of Mathematics at Vanderbilt University. He received his PhD in 1946 at UC Berkeley under supervision of Alfred Tarski.
Several mathematical objects are named for him, among them Jónsson algebras, Jónsson cardinals, and Jónsson–Tarski duality.